Methods for cementing a well using a switchable crossover device
US10648286B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2016 |
| Grant date | May 12, 2020 |
| Priority date | — |
| Expiry date | Sep 23, 2036 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B2200/06
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Switchable cross-over systems, devices, and methods for cementing well walls. A switchable cross-over device includes a tool body, a flow sleeve, and a hydraulic sleeve. The tool body includes a main tool path separable into upper and lower tool paths and an auxiliary chamber containing upper and lower annular ports. The flow sleeve is within the auxiliary chamber and movable into a reverse circulation position by a plug traveling through the main tool path. The hydraulic sleeve is located within the main tool path and mechanically coupled to the flow sleeve. The hydraulic sleeve is movable into a conventional circulation position via pressure within the main tool path acting on the hydraulic sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.